A011375 Number of decimal digits in the n-th term of A006960.

3, 3, 4, 4, 5, 5, 5, 6, 7, 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 11, 11, 12, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 16, 17, 17, 18, 18, 19, 19, 19, 20, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 32, 32, 33, 33, 34, 34

Offset

0,1

Links

Paolo Xausa, Table of n, a(n) for n = 0..10000

Fred Gruenberger, How to handle numbers with thousands of digits, and why one might want to, Computer Recreations, Scientific American, 250 (No. 4, 1984), 19-26.

Formula

a(n) = A055642(A006960(n)).

Mathematica

IntegerLength[NestList[# + IntegerReverse[#] &, 196, 100]] (* Paolo Xausa, Dec 01 2025 *)

Crossrefs

Cf. A006960, A055642.

Sequence in context: A145288 A075324 A134993 * A119661 A285269 A285786

Adjacent sequences: A011372 A011373 A011374 * A011376 A011377 A011378

Keyword

nonn,base

Author

Simon Plouffe

Extensions

More terms from Paolo Xausa, Dec 01 2025

Status

approved